Is the marriage to a female slave (*amah*) permissible during the waiting period (*iddah*) of a permanently divorced free woman (*hurrah ba'in*)?

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The marriage to a female slave during the waiting period of a permanently divorced free woman is permissible. The justification is that the man lacks the means (*tawl*, often interpreted as means for marriage, specifically financial means for a free woman) and fears falling into unlawful sexual intercourse (*'anat*). This permission is based on the verse: "And whoever among you cannot afford to marry free, believing women, [then marry] those whom your right hands possess of believing young women." (Quran 4:25).